i think you're misled somewhat there.
the whole epilogue is the side project. the game had been declared finished as of version 1.0, and everything that came after that, was either bugfixes, or bit by bit added content which yes, was talked about before they finished, but actually is what Marty does alongside his (main, more or less) solo project, 18titans.
now that he started to work on a gallery, is very likely owed to supporters nagging about it.. and again he has to trial&error that like he started coding, from scratch, and make it work with the game..
while none of the patreon people who come here, had spent a thought of just telling him there's already a working gallery mod existing, which the creator has agreed on to inform Marty. things could go So. Much. Faster. with any random patreon person telling Marty about it. probly DM him the Mega link, so he'd save some time have a look at that code and accept that idea as some shortcut.
i'd bet my savings on the fact neither of the FET dev team runs an account here.
on the other hand, waifu and i agreed i won't gamble, ever, also all of that is written over to my wife, for lessay legal mumbo jumbo reasons.